Справочник Пользователя для HP Cell Phone Accessories E6380-90019
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Chapter 3
Overview of the Test Set’s Built-In Tools
Using the Voltmeter and Audio Frequency Counter
Using the Voltmeter and Audio Frequency Counter
The voltmeter can be used to measure ac and dc voltages. The input to
the voltmeter is determined by the
the voltmeter is determined by the
AF Anl In
field on the AF
ANALYZER screen.
To measure external voltages:
1. Select the AF ANALYZER screen.
2. Set the AF Anl In field to Audio In.
3. Set the Audio In Lo field to match the source you are measuring
(600 ohm impedance, floating output amplifier, ground referenced
voltage). See the
voltage). See the
for more
information.
4. Connect the signal to be measured to the AUDIO IN connector(s).
The AUDIO IN HI connector can be used alone as long as the
Audio
In Lo
field is set to
Gnd
. The AUDIO IN LO connector must also be
used if the
Audio In Lo
field is set to
600 to Hi
or
Float
.
The ac level is displayed. See
.
5. Select the lower-right measurement display field. See
• Select
DC Level
to display the dc level.
• Select
AF Freq
to display the audio frequency.
Figure 3-4
Measuring AC and DC Voltages
Set to
Audio In.
Audio In.
AC Level
Set to
DC Level or
AF Freq.
DC Level or
AF Freq.
Set to match
source.
source.
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